CN110581618A

CN110581618A - Novel motor structure

Info

Publication number: CN110581618A
Application number: CN201910731466.1A
Authority: CN
Inventors: 汪晨
Original assignee: Nanjing Golden Dragon New Energy Automotive Research Institute Co Ltd
Current assignee: Nanjing Golden Dragon New Energy Automotive Research Institute Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2019-12-17

Abstract

The motor is fixed on the mounting seat, an even number of mounting shells are divided into two groups, the mounting shells are symmetrically fixed on the mounting seat by taking a rotating shaft on the motor as a symmetric center, each mounting shell is provided with a rotor cavity, a coil and a rotor are arranged in each rotor cavity, the rotors are parallel to the rotating shaft of the motor, the rotating shaft of the motor and each rotor transmit rotation through a gear, and the function of a main speed reducer can be replaced through the design of the transmission ratio of the gear. The invention increases the dynamic property, the motors are symmetrically arranged, the torque load of the rear axle is eliminated, the rotor output shaft is connected with the motor output shaft through the straight gear, the energy recovery unit is added during braking, the energy recovery efficiency is increased, the braking effect can be effectively improved by the resistance generated during energy recovery, when the output torque of the automobile runs at high speed, the torque can be output by local work in the rotor unit through a control strategy, and other units are in a power generation mode of passive rotation, so that the electric energy loss during high-speed running can be effectively recovered.

Description

novel motor structure

the technical field is as follows:

The invention relates to a novel motor structure.

Background art:

With the development of pure electric vehicles, the arrangement of the driving system is also diversified, wherein the "rear wheel driving arrangement of the motor-drive axle combination" has the advantages of uniform load distribution of the rear wheel driving axle, good operation stability and good driving smoothness, and simultaneously the transmission case and the transmission shaft are eliminated, thereby reducing energy loss, saving space and reducing the mass of the whole vehicle.

the main arrangement scheme of the 'integral bridge' is two arrangement modes of a forward rotating speed reducer and a backward main reducing speed reducer, and the two arrangement modes have the following defects:

(1) the motor in the integrated bridge is arranged in a front-to-back mode, so that the rear bridge bears the bending moment brought by vehicle load and the torque brought by motor offset; during the driving of the vehicle, the motor will have a small amplitude of motion rotating about the rear axle axis, which will subject the rear axle to a larger torque load.

(2) The integral bridge main body is reduced forwards or backwards, the maximum diameter section of the whole bridge package is vertical to the horizontal plane, the height of a whole vehicle chassis from the ground is not favorably reduced, the center of mass is not favorably moved downwards, and the running stability of the whole vehicle is influenced;

(3) In order to improve the power performance of automobile running, a main reducer with a large transmission ratio is needed, but the large transmission ratio of the main reducer can increase the diameter of a driven gear of the main reducer, further increase the diameter of a rear axle package, influence the running stability of the automobile, and cause the contradiction between the power performance and the stability.

(4) according to the basic law of electromagnetics, a theoretical calculation formula of the maximum output torque of the motor is deduced:

maximum output torque

Note: 1, B magnetic field intensity 2, I current 3, L motor length 4.n coil turns 5.R motor radius 6. distance between two adjacent turns of coil

From the above equation, the maximum output torque is proportional to the motor length and proportional to the square of the motor radius. To increase the maximum output torque of the motor, increasing the radius is the most effective means. However, for the arrangement mode that the main reducer faces forwards or backwards, the cross section of the motor in the diameter direction is perpendicular to the horizontal plane, when the power performance of the automobile needs to be increased, the ground clearance of the chassis can be increased by increasing the diameter of the motor, the mass center position of the whole automobile is increased, and the running stability of the automobile is reduced. This creates a conflict between the power performance and the driving stability of the electric vehicle.

The invention content is as follows:

the present invention provides a novel motor structure to solve the above problems of the prior art.

The technical scheme adopted by the invention is as follows: the utility model provides a novel motor structure, is including installation casing, mount pad, motor, rotor and coil, on the motor was fixed in the mount pad, even number installation casing divided into two sets ofly, and used the pivot on the motor to fix on the mount pad as the symmetry center symmetry, was equipped with a rotor cavity on every installation casing, set up a coil and rotor in every rotor cavity, and the rotor is parallel with the pivot of motor, and passes through gear transmission torque between the pivot of motor and each rotor.

furthermore, four rotors are arranged, every two rotors are in a group and are symmetrically arranged on two sides of the motor.

The invention has the following beneficial effects:

1. And (3) power performance is increased:

3. the motors are symmetrically arranged, so that the torque load of the rear axle is eliminated;

4. The output shaft of the rotor is connected with the output shaft of the motor through a straight gear, when braking is carried out, an energy recovery unit is added, the energy recovery efficiency is increased, and the braking effect can be effectively improved through resistance generated during energy recovery;

5. When the output torque of the automobile in high-speed operation is small, the local working output torque in the rotor unit can be realized through a control strategy, and other units are in a passive rotating power generation mode, so that the electric energy loss in high-speed operation is effectively recovered.

description of the drawings:

FIG. 1 is a block diagram of the present invention.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings.

referring to fig. 1, the novel motor structure of the present invention includes a mounting housing 1, a mounting base 2, a motor, a rotor and coils, wherein the motor is fixed on the mounting base 2, an even number of the mounting housings 1 are divided into two groups, and are symmetrically fixed on the mounting base 2 by taking a rotating shaft of the motor as a symmetric center, each mounting housing 1 is provided with a rotor cavity, each rotor cavity is provided with a coil and a rotor, the rotor is parallel to the rotating shaft of the motor, and torque is transmitted between the rotating shaft of the motor and each rotor through gears.

Aiming at the defects of the arrangement of the front main reducer and the rear main reducer in the 'motor-drive axle combined rear wheel drive arrangement form', the invention designs a motor form which is in accordance with the arrangement form of the front main reducer and the upper main reducer.

The invention has even number of rotor units symmetrically distributed on two sides of the output shaft, the rotor shaft is parallel to the output shaft of the motor and is vertical to the horizontal plane when being arranged, the output shaft of the rotor and the output shaft of the motor transmit torque through gears, and the effect of different reduction ratios is achieved by changing the diameter of the transmission gear.

The upper end cover of the motor is used for installing the gear, and the end cover is provided with a fixed point of the gear rotating bearing; the middle part is a motor main body casing which is provided with an even number of rotor cavities; the lower end cover is used for installing the rotor with the coil and wiring of a rotating magnetic field in the cavity.

compared with the prior art, the invention has the following advantages:

1. And (3) power performance is increased:

(1) the even number of rotors output torque, so that the torque output capacity is improved;

(2) the length direction of the motor is vertical to the horizontal plane, the diameter of the motor is increased, the dynamic property of the motor is increased, and the vertical height of the whole rear axle is not influenced, so that the ground clearance of the chassis is increased;

2. Increase stability

(1) The speed reduction and torque increase device is arranged, and the transmission ratio of a main speed reducer of the rear axle is reduced, so that the size of a rear axle package is reduced, the mass center of the whole vehicle is reduced, and the stability is improved;

(2) The motor is axially vertical to the horizontal plane, the length of the motor has less influence on the dynamic property, the length of the motor can be properly reduced, the ground clearance is reduced, and the stability is improved;

The two points effectively solve the contradiction between the stability and the dynamic property.

the foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.

Claims

1. a novel motor structure is characterized in that: the motor is fixed on the mounting seat (2), an even number of mounting shells (1) are divided into two groups, the mounting shells are symmetrically fixed on the mounting seat (2) by taking a rotating shaft on the motor as a symmetric center, a rotor cavity is arranged on each mounting shell (1), a coil and a rotor are arranged in each rotor cavity, the rotor is parallel to the rotating shaft of the motor, and torque is transmitted between the rotating shaft of the motor and each rotor through gears.

2. the novel electric machine structure of claim 1, wherein: the four rotors are arranged, every two rotors are in a group and are symmetrically arranged on two sides of the motor.